Cupola-furnace.



N0. 638,54l. Patented Dec. 5, 1899. M. ZIPPLER.

CUPOLA FURNACE.

(Application filed Oct. 20, 1898.)

(No Model.)

UNITED STATES PATENT FFlCE.

MICHAEL ZIPPLER, OF ALLEGHENY, PENNSYLVANIA.

'CUPOLA-FURNACE.

SPECIFICATION forming part of Letters Patent No. 638,541, dated December 5, 1899. Application filed October 20, 1898- Serial No. 694,135. (No model.)

To all whom it may concern.-

Be it known that I, MICHAEL ZIPPLER, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a certain new and usefulImprovement in Oupola-Furnaces, of which the following is a specification.

My invention relates to cupola-furnaces, and has special reference to the formation of the linings in such furnaces.

One object of my invention is to provide a simple and effective lining for cupola-furnaces which will prevent the clogging of the material within the furnace after the metal has been run out of the furnace, and, further, to prevent the molten metal from running into the air-fines and burning out the lining and clogging the air-fines.

Another object of my invention is to provide such a lining which can be easily and rapidly constructed and repaired and will prevent the rapid burning out of the same by the intense heat, as well as one which is cheap and simple in its construction and will assist in the more rapid melting of the iron therein.

A further object of my invention is to provide such a form of lining as will prevent the cinder, metal, &c., from adhering to the lining and so do away with the possible breaking or chipping of the ordinary brick lining during the cleaning or removal of said cinder, metal, 850., therefrom.

My invention consists, generally stated, in the novel arrangement, construction, and combination of parts, as hereinafter more specifically set forth and described, and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and use the lining, I will describe the same more fully, referring to the accompanying drawings, in

. which of one of the metal blocks, and Fig. 6 is a per spective View of one of the metal bricks or plates.

Like letters herein indicate like parts in each of the figures of the drawings.

The cupola-furnace is shown at A, and is provided with the ordinary sheeting or casing a, inclosing the lining b, which is generally formed of fire-brick and of the same general thickness of walls throughout the length or height of the furnace A. Casing a and lin ing d of the cupola A are built up from the bottom plate 0, which rests upon columns (1, extending down to the ground or floor of the foundry or mill for supporting the cupola A. The bottom plate 0 is preferably formed in four pieces and has an opening 0 therein, which is closed by the doors 0 hinged at c to each side of the bottom 0 and forms the bottom or base of the cupola A for supporting the material within the same and permitting the withdrawal of said material contained within the cupola A after the heat or when desired. At the bottom of the cupola A, adjacent to the bottom plate 0, is the ordinary tap-hole 0 which extends through the casing a and lining b, and is adapted to draw off the molten metal from the interior of the cupola A. In the present construction the lining bis built up from the bottom plate 0 for a short distance of uniform thickness to form the wailf, upon which is secured the lower metal ring g, which is formed in segmental plates or sections g. the metal ring g are a series of metal blocks h,which are placed around the ring g, so as to form the spaces or flues h bet-ween them and the space or line It between the rear of the block it and the casing a for the circulation of air to the interior of the cupola A from airpipes 2" opening into the interior of thecupola A from the main blast-pipe t' on the exterior of the cupola A. These metal blocks hare pro vided with curved faces h corresponding to the interior curved line of the ring 9 and the recesses If on the rear of the same for more properly distributing the air from the airpipes t" to the interior of the cupola A. Another metal ring j, formed in segmental plates or sections 3'", is laid or secured upon the metal blocks h for supporting themetal bricks or plates is, which are tapered on their Resting u pon sides, as at Zr, so as to form a brick or plate of keystone or wedge shape for insertion to form the circular metal lining Z2 at that point. The bricks or plate k are inclined upwardly and inwardly toward the center of the eupola A on their front faces as at k and, if desired, the plates 70 can be recessed on their rear faces 70 for the purpose of decreasing the weight of the same. The metal bricks or plates 7c are also provided with top faces 7t and bottom faces 70", and upon the top faces 70 rests the upper metal ring Z, which is formed in plates or sections Z and supports the lining b of the lining b. This lining b is preferably of ordinary fire-brick and extends from the inner edge of the metal ring Z backward and upward on an incline, as at 19 toward the upper lining b of the lining Z; to form the inward projecting portion b of the lining b, and this upper lining b being preferably formed of fire-brick of a thickness about four and one-half (11 inches from the lining I) up to the top of the cupola A.

The manner of constructing and operating my improved cupola-furnace A is as follows: The wallf, forming part of the lining Z), is built up from the bottom plate 0 to the required distance within the casing CL, and the segmental plates g to form the lower metal ring g are placed upon and secured to the top of said wall f, after which the metal blocks h are placed in position upon the ring and the required distance apart to form the flue hand flue 76 The segmental sections, composing the middle metal ringj, are then placed upon and secured over the metal blocks 7L, and this ringj is firmly secured to the metal bricks or plates k, which are set to form the circular metal lining b, so that the inner edge of the bottom faces 7& rest flush with the inner edge of the ring j. The plates or bricks 70, being of wedge shape, are set side by side and firmly secured in place to form the lining at the point in the furnace A where the greatest heat is maintained. The segmental sections Z, comprising the ring Z, are then placed upon the metal bricks k, with their inner edges flush with the upper edge of the inclined faces 70 on the front face 70 of the bricks 7c, and upon this ring Z is built up the lining Z1 of the lining Z). This lining b is inclined backward from the edge of the ring Z to form the inwardly-projecting portion b and upon this lining Z9 is built the upper Wall or lining 1), running to the top of the cupola A. The sand, coke, &c., are placed upon the doors 0 within the cupola A, and said material extends up to about the top of the lining b-, where the metal to be melted is placed. The

fire having been started within the cupola A and actuated by the blast from the air-pipes i, the metal will be caused to melt and run down the lining 12 through the coke to the bottom of the cupola A away from the airflues h, where it can be drawn off through the tap-hole 0%.

After the metal has been melted and drawn off through the tap-hole c the doors 0 can be opened and the material left within the cupola A will be free from the lining Z), so as to be dropped to the ground or floor.

It will thus be seen that my improved cupola-furnace lining is cheap and simple, and its construction and practical experience have proved that it will prevent the clogging of the material within the furnace and the running of the metal into the ai-r-fiues, so prolonging the life of the lining and the furnace, and thus saving labor, time, and expense in the operation of these furnaces. It will also be seen that by the use of this particular kind of lining it will prevent the cinder, metal, &c., from adhering thereto,asin the ordinary brick lining, and so do away with all liability of the breaking or chipping of the same during the cleaning out or removing of said adhering substance, as in the case of brick lining.

lVhat I claim as my invention, and desire to secure by Letters Patent, is

1. A cupola-furnace having its lining form edwith an inwardly-projecting fire brick or clay portion at the base thereof, and a metal lining below the same extending backwardly or outwardly from the edge of said projecting portion.

2. A cupola-furnace having its lining formed with an in wardly-projecting fire brick or clay portion at the base thereof, and an outwardly-flaring metal portion below the same.

3. A cupolafurnace having its lining formed with an inclined fire brick or clay portion extending downwardly toward the interior of the furnace at thebase portion thereof and an outwardly-flared metal portion below the same.

a. A cupola-furnace having its lining formed with an inclined fire brick or clay portion extending downwardly toward the interior of the furnace at the base portion thereof, and a series of metal bricks forming an outwardly-flared lining under said inclined portion.

5. A cupola-furnace having its lining formed with an inclined fire brick or clay portion extending downwardly toward the interior of the furnace at the base thereof, a series of metal bricks forming an outwardlyfiared lining under said inclined portion, and a series of metal blocks under said metal bricks, having air-spaces between them.

6. A cupola-furnace having its lining formed with an inclined fire brick or clay poress,541 e flared lining under said metal ring under said metal bricks, a series of metal blocks forming air-spaces between them, and a metal ring between said metal blocks and the baselining".

In testimony whereof I have hereunto set my hand, at Pittsburg, in the county of Allegheny and State of Pennsylvania, this 24th day of September, A. D. 1598.

MICHAEL ZIPPLER.

\Vitnesses:

J. N. Ooo E, M. E. CONNOR. 

